Improvement in dust-ejectors



UNITED STATES PATENT UEEIOE.I

LOUIS` STERNE, OE LONDON, ENGLAND.

IMPROVEMENT lNV DUST-EJECTORS.

Specification forming part of Letters Patent No. 156,605, dated November 3, 1874 ;4 application filed October 20, 1874.

-providing the car or vehicle at any convenient point-with a box or tube communicating with the interior of the car at its center, and with daring or trumpet-shaped ends facing the front and rear of the car. At the center of suchvtube, Where it communicates with the car, a valve is arranged to work automatically, so as to change the direction of the current from the car to adapt the device to work properly in whatever direction the car Y is moved. The current of air which is inducedl by the rapid motion of the cnr, through the tube or box, induces a current through the car, as will be hereinafter described, and thor- Voughly ventilates the same, removing dust,

cinders, smoke, 85e, and insuring a constant supply of fresh air in the car.

In the drawings, Figure l shows `an ordinary car,.\with a portion cut away, showing my improved device' in section. Fig. 2 represents an `enlarged end view of the device, partly in section; and FigQB, an enlarged horizontal section of the same.

A represents the car, constructed in theor- Vdinar-y lnanner, and B the box or tube secured under the bottom or flooring ot' the same, at or about the center of the car. C represents a short tube extending upward at right angles to thetube B, through the flooring of the car, and terminatingflush with the upper surface of the saine, where it is provided with a reg` ister, a perforated plate, or other equivalent device. Immediately below the said tube C, midway between the two ends of the tube B, is pivoted a valve, D, of such length that the upper side of the same will fall against either side of the tube C, as occasion may require, the said valve being so set that its lower end will clear the bottom of the tube, leaving a space for the passage of air,'as shown in Figs. l and 2. The front and rear ends of the tube Bare made flaring or trumpetshaped, in order to more readily take the air, as indicated at b b.

The operation of my invention will be readily understood from the above description. When the car is put in motion a current of air is induced through the tube B, in a direction opposite to the direction in which the car is moving, as indicated by the straight arrows. This will automatically set the valve D in proper position, the current of air in passing through the tube C, as indicated by the curved arrows, exhausting the air in the car, which must be supplied by fresh air from the outside.

The valve l), having a centrally-located axis seated within the tube or way B, directly beneath the centerr of the vertical tube C, which communicates with the interior of the car or vehicle, said valve being so set as to clear the bottom ofthe tube B when oscillated, substantially as described.

In testimony that I claim the .foregoing I have hereunto set my hand.

- L. STERNE, C. E.

Witnesses:

ALBERT H. NoERis, JAMEs L. NoEEIs. 

